The most important thing: 9% of users develop a cannabis addiction – compared to 32% for nicotine, 23% for heroin and 15% for alcohol. Daily users: 25-50 % risk. Dependence is real, but substance-specific lower. At a glance: 9% of users develop dependence (vs. 32% nicotine, 23% heroin, 15% alcohol) Daily use: 25-50% risk of […]